/* Copyright (C) 2004 - 2006  db4objects Inc.  http://www.db4o.com

This file is part of the db4o open source object database.

db4o is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation and as clarified by db4objects' GPL 
interpretation policy, available at
http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
Suite 350, San Mateo, CA 94403, USA.

db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. */
namespace Db4objects.Db4o.Internal.Btree
{
	public interface IBTreeRange
	{
		/// <summary>
		/// Iterates through all the valid pointers in
		/// this range.
		/// </summary>
		/// <remarks>
		/// Iterates through all the valid pointers in
		/// this range.
		/// </remarks>
		/// <returns>an Iterator4 over BTreePointer value</returns>
		System.Collections.IEnumerator Pointers();

		System.Collections.IEnumerator Keys();

		int Size();

		Db4objects.Db4o.Internal.Btree.IBTreeRange Greater();

		Db4objects.Db4o.Internal.Btree.IBTreeRange Union(Db4objects.Db4o.Internal.Btree.IBTreeRange
			 other);

		Db4objects.Db4o.Internal.Btree.IBTreeRange ExtendToLast();

		Db4objects.Db4o.Internal.Btree.IBTreeRange Smaller();

		Db4objects.Db4o.Internal.Btree.IBTreeRange ExtendToFirst();

		Db4objects.Db4o.Internal.Btree.IBTreeRange Intersect(Db4objects.Db4o.Internal.Btree.IBTreeRange
			 range);

		Db4objects.Db4o.Internal.Btree.IBTreeRange ExtendToLastOf(Db4objects.Db4o.Internal.Btree.IBTreeRange
			 upperRange);

		bool IsEmpty();

		void Accept(Db4objects.Db4o.Internal.Btree.IBTreeRangeVisitor visitor);

		Db4objects.Db4o.Internal.Btree.BTreePointer LastPointer();
	}
}
